JP6748463B2 - Membrane module - Google Patents

Description

The present invention relates to a membrane module including a separation membrane and a container that houses the separation membrane and has a fluid inlet and an outlet, and more particularly, to a fitting structure of an end portion of the container. ..

As a structure of a conventional spiral wound type membrane element (hereinafter, also simply referred to as “membrane element”), one or more of a separation membrane, a feed-side channel material and a permeation-side channel material is a separation membrane, a feed-side channel material. Also, it is known that one or more of the permeate-side flow path members includes a wound body wound around a perforated central tube (see, for example, Patent Document 1).

FIG. 7 is a partially cutaway perspective view of a conventional membrane element. The membrane element 1 shown in this figure has a structure in which a membrane member including a separation membrane 2, a supply side channel material 6 and a permeation side channel material 3 is wound around a central tube 5. More specifically, an envelope-shaped membrane (bag-shaped membrane) is formed by stacking the separation membranes 2 on both surfaces of the permeation-side channel material 3 and adhering the three sides, and the opening of the envelope-shaped membrane is centered. It is configured by being attached to the pipe 5 and spirally wound around the outer peripheral surface of the central pipe 5 together with the net-shaped (net-shaped) supply side flow path member 6. An upstream end member 10 such as a seal carrier is provided on the upstream side of the wound body R, and a downstream end member 12 such as a telescope prevention member is provided on the downstream side.

When using the membrane element 1, the stock solution 7 is supplied from one end surface side of the membrane element 1. The supplied stock solution 7 flows along the supply-side flow path member 6 in a direction parallel to the axial direction of the central tube 5, and is discharged as a concentrated solution 9 from the other end face side of the membrane element 1. Further, the permeated liquid 8 that has permeated the separation membrane 2 in the process in which the undiluted solution 7 flows along the supply-side flow path member 6 has the center from the opening 5a along the permeation-side flow path member 3 as indicated by the broken line arrow in the figure. It flows into the inside of the tube 5 and is discharged from the end of the central tube 5.

In the conventional spiral wound type membrane module in which such a membrane element 1 is housed in a pressure vessel, a stock solution supply section is provided at one end of the pressure vessel, and a concentrated solution discharge section and a permeation section are provided at the other end. A liquid discharge portion is provided, and a seal material provided on the outer periphery of the upstream end member 10 has a structure in which the stock solution flows inside the membrane element 1.

The pressure vessel has a cylindrical member and a lid member so that the membrane element 1 can be replaced, and the lid member can be fastened to the flange portion provided at the end of the cylindrical member by a bolt or the like. It has a simple structure.

On the other hand, in the case of a membrane module having a hollow fiber membrane, a container for housing the hollow fiber membrane is often integrated. For example, in Patent Document 2, a container that accommodates a hollow fiber membrane has a cylindrical member and a cap that can be screwed onto an end thereof, and an O-ring is interposed therebetween, and the cap is a cylinder. It is disclosed that the adhesive member is fixed to the strip member.

JP, 10-137558, A JP, 2014-240076, A

However, when it is not necessary to replace the membrane element, the structure in which the flange portion is provided on the cylindrical member has a problem that the manufacturing cost of the container becomes relatively large. Further, as described in Patent Document 2, in the structure in which the cap is fixed to the cylindrical member only with the adhesive, there is a problem that the pressure resistance of the container cannot be sufficiently secured unless the adhesion area is increased. Further, in the structure in which the cap is screwed into the cylindrical member, the rotation position of the cap is determined at the time of screwing, so that there is a problem that the fluid inlet or the like cannot be arranged at a predetermined position, and the screwing work is complicated. Tends to be.

Therefore, an object of the present invention is to provide a membrane module in which the cost of the container is suppressed due to the simple structure, the container can be assembled by a simple operation, and the fluid inlet or the like can be arranged at a predetermined position. is there.

The above object can be achieved by the present invention as described below.
That is, the membrane module of the present invention is a membrane module comprising a separation membrane and a container having the separation membrane and having a fluid inlet and an outlet, wherein the container is an outer cylinder member and an outer cylinder member thereof. Of at least one end of the inner fitting member, and a seal member and an elastic member interposed between the outer cylinder member and the inner fitting member, the outer cylinder member, the end portion An inner wall annular groove on the inner wall surface of the inner wall member, the inner fitting member has an outer wall annular groove at a position on the outer wall surface facing the inner wall annular groove, and the elastic member includes the inner wall annular groove and the outer wall annular groove. And can be expanded or reduced so as to substantially fit in the inner wall annular groove or the outer wall annular groove.

According to the membrane module of the present invention, since the elastic member can be expanded or contracted so as to substantially fit in the inner wall annular groove or the outer wall annular groove, when the inner fitting member is inserted into the end portion of the container, the elastic member is formed into the inner wall annular groove. The elastic member can be engaged across the outer wall annular groove and the inner wall annular groove and the inner fitting member can be prevented from coming off simply by inserting the outer fitting member into the groove or the outer wall annular groove in a state of being substantially housed. In this engaged state, the sealing material interposed between the outer cylinder member and the inner fitting member can prevent leakage of fluid, so that the cost of the container can be suppressed due to the simple structure, and the container can be easily operated. Can be assembled. Moreover, since there is no need for screwing, the inner fitting member can be freely rotated, so that the fluid inlet or the like can be arranged at a predetermined position. As a result, it is possible to provide a membrane module in which the cost of the container is suppressed due to the simple structure, the container can be assembled by a simple operation, and the fluid inlet or the like can be arranged at a predetermined position.

In the above, it is preferable that the outer cylindrical member has an inner wall whose cross-sectional shape is substantially circular, and the elastic member is a C ring that can be reduced to a size equal to or less than the size of the inner wall periphery. By using such a C ring, the elastic member can be reduced to a size equal to or smaller than the size around the inner wall by a simpler operation, and the C ring expands after the inner fitting member is inserted into the end portion of the container. The inner fitting member can be prevented from coming off by making the diameter and engaging with the outer wall annular groove.

At this time, it is preferable that the elastic member is a C ring having an inclined surface whose diameter increases from the center side of the outer tubular member toward the end side. With such an inclined surface, even when the C ring is not completely housed in the outer wall annular groove, when the inclined surface and the end edge of the inner wall of the outer tubular member come into contact with each other, force is applied in a direction in which the C ring contracts. Can work to smoothly insert the inner fitting member into the end portion of the container. Further, for the same reason, it is preferable that the edge of the inner wall surface of the outer tubular member has an inclined surface whose diameter increases from the center side toward the end side.

Further, the inner fitting member has a sealing annular groove on the center side of the outer tubular member with respect to the outer wall annular groove, and the sealing material is an O-ring held in the sealing annular groove. preferable. By providing the sealing annular groove at such a position, the O-ring is held closer to the center side than the elastic member, so that it is possible to prevent an adverse effect caused by the fluid flowing into the outer wall annular groove and the inner wall annular groove and staying there.

In addition, a perforated center tube, a wound body in which a membrane member including the separation membrane, the supply-side channel material and the permeate-side channel material is wound around the center tube, and provided on the outer periphery of the wound body. It is preferable that a membrane element including the outer packaging material is housed in the container.

It is known that such a membrane element has a large effective membrane area per unit volume as a spiral membrane element and can apply high pressure, and is particularly effective as a membrane element used in the membrane module of the present invention.

A longitudinal sectional view showing an example of the membrane module of the present invention. Left side view showing an example of the membrane module of the present invention Right side view showing an example of the membrane module of the present invention It is a figure which shows the principal part of an example of the membrane module of this invention, (a) is an assembly perspective view of a container end part, (b) is a longitudinal cross-sectional view of a container end part. FIG. 3 is a vertical cross-sectional view showing a main part of another example of the membrane module of the present invention. FIG. 3 is a vertical cross-sectional view showing a main part of another example of the membrane module of the present invention. A perspective view showing an example of a conventional spiral wound type membrane element.

The membrane module of the present invention is a membrane module including a separation membrane and a container that houses the separation membrane and has a fluid inlet and an outlet, and is characterized by a container fitting structure. Therefore, with respect to the configuration other than the fitting structure of the container, any conventionally known configuration, for example, the configuration of the membrane element, the structure of the fluid inlet and the outlet, or the like can be adopted.

In the present embodiment, as shown in FIG. 1, a central tube 5 having a hole, a wound body R in which a film member is wound around the central tube 5, and an exterior provided on the outer periphery of the wound body R. An example of housing a membrane element including the material 13 will be described. Here, the membrane member is similar to the conventional spiral wound type membrane element, and includes, for example, a separation membrane 2, a supply side channel material 6 and a permeation side channel material 3 as shown in FIG. 7.

In this embodiment, for example, as shown in FIG. 1, the container accommodates the membrane element 1, has a supply portion 22a for the undiluted solution 7 at one end in the axial direction, and has the other end in the axial direction. An example of the pressure vessel 20 having a discharge portion 23b for the concentrated liquid 9 and a discharge portion 23a for the permeated liquid 8 is shown in FIG.

(Membrane element)
As the membrane element 1, it is possible to use the same spiral-type membrane element as in the conventional one as shown in FIG. The downstream end member 12 included therein can be omitted. Therefore, description will be made with reference to FIG. 7.

As shown in FIG. 7, the membrane element 1 is a membrane member including a central tube 5 having a hole on the outer periphery, and one or more of a separation membrane 2, a supply-side channel material 6 and a permeation-side channel material 3. However, the winding body R wound around the central tube 5 and the exterior material 13 provided on the outer periphery of the winding body R are provided. In the present embodiment, an example in which a plurality of membrane members including the separation membrane 2, the supply side channel material 6 and the permeation side channel material 3 are wound around the central tube 5 is shown. The unit may be wound around the central tube.

The membrane element 1 is usually provided with a sealing portion for preventing mixing of the supply side flow passage and the permeation side flow passage. For example, when the separation membrane 2 is overlapped on both surfaces of the permeation-side channel material 3 and the three sides are adhered to form an envelope-shaped membrane (bag-shaped membrane), the sealing portion 11 on the outer peripheral side edge and the upstream side are formed. A sealing portion is formed on the edge and the downstream edge. Further, it is preferable to provide a sealing portion between the inner peripheral side ends of the upstream side edge and the downstream side edge and the central tube 5.

The envelope membrane is attached to the central tube 5 at its opening, and is spirally wound around the outer peripheral surface of the central tube 5 together with the net-shaped (mesh-shaped) supply-side flow path member 6 to form a wound body R. To be done. An upstream end member 10 such as a seal carrier is provided on the upstream side of the wound body R, and a downstream end member 12 such as a telescope prevention member is provided on the downstream side as necessary. Good.

When using the membrane element 1, the stock solution 7 is supplied from one end surface side of the membrane element 1. The supplied stock solution 7 flows along the supply-side channel material 6 in a direction parallel to the axial direction of the central tube 5, and is discharged as a concentrated solution 9 from the other end face side of the membrane element 1. Further, the permeated liquid 8 that has permeated the separation membrane 2 in the process in which the undiluted solution 7 flows along the supply-side flow path member 6 is centered from the opening 5a along the permeation-side flow path member 3 as shown by the broken line arrow in the figure. It flows into the inside of the tube 5 and is discharged from the end of the central tube 5.

As the separation membrane 2, the supply-side flow path member 6, the permeation-side flow path member 3, and the central tube 12, those similar to the conventional one can be used.

For example, as the supply-side flow path member 6, a net-shaped sheet, a mesh-shaped sheet, or the like made of an arbitrary material can be used, but polyolefins such as polypropylene and polyethylene are preferably used. As the permeation side flow path member 3, a net-like sheet, a mesh-like sheet, a grooved sheet, a corrugated sheet or the like made of any material can be used. As the separation membrane 2, a reverse osmosis membrane, a nanofiltration membrane, an ultrafiltration membrane or the like can be used.

As the exterior material 13, a resin sheet, a resin tape, a fiber reinforced resin, or a composite structure of these can be used as in the conventional membrane element 1.

(Pressure vessel)
The container according to the present invention includes an outer tubular member, an inner fitting member that is internally fitted to at least one end of the outer tubular member, and a sealing material and elasticity interposed between the outer tubular member and the inner fitting member. And a member. In the present embodiment, for example, as shown in FIGS. 1 and 4, the pressure vessel 20 includes a cylindrical member 21 that is an outer tubular member and a first end portion that is an inner fitting member that is internally fitted to one end portion thereof. An example including a member 22, a sealing member 22c and an elastic member 24 interposed between the cylindrical member 21 and the first end member 22 will be shown. Also, a second end member 23 that is an inner fitting member that is internally fitted to the other end, a seal member 22c and an elastic member 24 that are interposed between the cylindrical member 21 and the second end member 23, Here is an example including. Hereinafter, the fitting structure of the first end member 22 will be described, but the same structure can be applied to the second end member 23.

The cylindrical member 21 which is the outer cylinder member has an inner wall annular groove 21a on the inner wall surface of the end portion, and the first end member 22 which is the inner fitting member is located on the outer wall surface at a position facing the inner wall annular groove 21a. It has an annular groove 22d. In the present invention, the inner wall annular groove 21a and the outer wall annular groove 22d only need to be provided at positions where at least a part of them face each other, and it is not necessary that the entire grooves be provided at positions that completely face each other.

The elastic member 24 is engaged with the inner wall annular groove 21a and the outer wall annular groove 22d, for example, as shown in FIG. 4(b). In the illustrated example, the elastic member 24 is engaged with both the central side wall and the end side wall of the inner wall annular groove 21a and the outer wall annular groove 22d. In the present invention, at least the elastic member 24 has only to be engaged with the end side wall of the inner wall annular groove 21a and the central side wall of the outer wall annular groove 22d, so that when pressure is generated in the container, It is possible to prevent the fitting member from falling off.

The elastic member 24 can be expanded or contracted so as to be substantially housed in the inner wall annular groove 21a or the outer wall annular groove 22d. In this embodiment, the elastic member 24 is an example of a C ring that can be reduced to a size equal to or smaller than the size of the inner wall periphery thereof.

That is, for example, as shown in FIG. 4A, the elastic member 24 is expanded in diameter and fitted onto the outer wall annular groove 22d of the first end member 22 (in this state, the elastic member 24 is fitted into the outer wall annular groove 22d). The diameter of the elastic member 24 is larger, and the elastic member 24 can be reduced by a hand, a jig, or the like to be substantially accommodated in the outer wall annular groove 22d. Therefore, in this state, the elastic member 24 can be inserted into the end portion of the cylindrical member 21 and when it is inserted to the position of the inner wall annular groove 21a, the elastic member 24 expands to its original size and engages with the inner wall annular groove 21a. You can

When the elastic member 24 is contracted, if the outer diameter is smaller than the inner diameter of the cylindrical member 21, the first end member 22 is inserted into the end of the cylindrical member 21 even if there is a portion that is not accommodated in the outer wall annular groove 22d. it can. Therefore, the elastic member 24 does not have to be expandable or contractable so as to be completely accommodated in the inner wall annular groove 21a or the outer wall annular groove 22d.

In the illustrated example, the first end member 22, which is an inner fitting member, is provided with the enlarged diameter portion 22e. With this, the enlarged diameter portion 22e contacts the end surface of the cylindrical member 21 and positions the inner fitting state. be able to. Therefore, the expanded diameter portion 22e can be omitted.

Examples of the material of the elastic member 24 include resins, metals, rubbers, composites of these, and the like, and resins or metals are preferable from the viewpoints of durability of engagement, flexural modulus, ease of manufacture, and the like.

In the illustrated example, the elastic member 24 has a rectangular cross section, but at least the elastic member 24 can be engaged with the end side wall of the inner wall annular groove 21a and the central side wall of the outer wall annular groove 22d. , And may have any cross-sectional shape (see FIGS. 6A to 6C).

The sealing structure using the sealing material 22c is not particularly limited as long as the first end member 22 can be inserted into the end of the cylindrical member 21 and a liquid-tight structure can be secured, and a conventionally known sealing structure is used. Can be adopted.

In the illustrated example, the sealing material 22c is an O-ring, the first end member 22 which is an inner fitting member has a sealing annular groove 22f closer to the center of the outer tubular member than the outer wall annular groove 22d, and the sealing thereof is performed. The O-ring is held in the annular groove 22f for use. With such a seal structure and the retaining structure using the elastic member 24, the cost of the container can be suppressed due to the simple structure, and the container can be assembled by a simple operation. Moreover, since there is no need for screwing, the inner fitting member can be freely rotated, so that the fluid inlet or the like can be arranged at a predetermined position.

The pressure vessel 20 in the present embodiment further includes a second end member 23, and the second end member 23 is fitted in a liquid-tight state to the other end of the cylindrical member 21. As the structure for making the liquid-tight state, for example, the same structure as the fitting structure of the first end member 22 can be adopted. The first end member 22 and the second end member 23 can be manufactured by, for example, forming using resin.

The cylindrical member 21 can be formed of any material such as resin, metal, and ceramics, but from the viewpoint of pressure resistance and weight reduction, a cylindrical metal mold such as a mandrel is used and the reinforcing fiber ( It is preferably formed of a fiber-reinforced resin around which roving fibers are wound. In order to form the inner wall annular groove 21a, a mold material having the same shape as the inner wall annular groove 21a and capable of being divided into a plurality of pieces is provided around the cylindrical mold, and after the cylindrical member 21 is molded, the mold material is formed. Just remove it.

As shown in FIGS. 1 to 3, a connection pipe for connecting to an external pipe is provided at the supply portion 22a of the stock solution 7 of the first end member 22 and the discharge portion 22b of the concentrated liquid 9 of the second end member 23. Is formed in a liquid-tight manner. In order to make the connecting pipe liquid-tight, for example, an O-ring or the like is used, and various structures for preventing coming off can be adopted (all are not shown).

As shown in FIGS. 1 and 3, the second end member 23 has a discharge portion 23 a for the permeated liquid 8. In this example, the sealing material 5b such as an O-ring is held in the fitting portion of the second end member 23, and the inserted central tube 5 is fitted in and held liquid-tight. A connecting pipe 5c for connecting to an external pipe is provided at the tip of the central pipe 5.

Further, as shown in FIGS. 1 to 3, when the second end member 23 has a discharge portion 23a for the permeated liquid 8, the first end member 22 has a tight plug 22b or one end for closing the central tube 5. It is preferable to provide a fitting portion that is closed. In this example, a sealing material 5b such as an O-ring is held in the fitting portion of the first end member 22, the inserted central tube 5 is fitted therein, and a sealing plug 22b is further provided to keep the liquid tight.

(Other Embodiments of Membrane Module)
(1) In the above-described embodiment, the example in which only the second end member 23 has the discharge portion 23a for the permeated liquid 8 has been shown, but the first end member 22 may be provided with the discharge portion 23a for the permeated liquid 8, It is also possible to provide the first end member 22 and the second end member 23 with a discharge portion 23a.

(2) In the above-described embodiment, an example in which the elastic member 24 is a C ring that can be reduced to a size equal to or smaller than the size around the inner wall of the cylindrical member 21 that is the outer cylindrical member is shown. In addition, the elastic member 24 may be a C ring that can be expanded to a size larger than the size around the outer wall of the first end member 22 that is the inner fitting member.

In that case, the elastic member 24 is reduced in diameter in advance and fitted into the inner wall annular groove 21a of the cylindrical member 21, and in that state, the first end member 22 which is the inner fitting member is inserted into the end portion of the cylindrical member 21. To do. At this time, since the distal end side of the first end member 22 has an inclined surface whose diameter is reduced on the distal end side, the elastic member 24 (C ring) expands in diameter during insertion, and the elastic member 24 reaches the position of the outer wall annular groove 22d. When inserted, the elastic member 24 returns to the original size and engages with the inner wall annular groove 21a and the outer wall annular groove 22d.

(3) In the above-described embodiment, an example in which the first end member 22 that is the inner fitting member has the sealing annular groove 22f closer to the center of the outer tubular member than the outer wall annular groove 22d is shown in FIG. As shown in b), the first end member 22 which is the inner fitting member may have a sealing annular groove 22f on the end side of the outer tubular member with respect to the outer wall annular groove 22d.

(4) In the above-described embodiment, an example of the fitting structure in which the elastic member 24 is provided only at one place has been shown. However, in the present invention, as shown in FIG. A combined structure may be adopted. Similarly, as the sealing structure, a sealing structure using the sealing material 22c at two or more places may be adopted.

(5) In the above-described embodiment, the example in which the elastic member 24 is the C ring has been shown, but in the present invention, the annular elastic member 24 may be any one as long as it is elastically deformed by an external force to change the outer diameter or the inner diameter. Can be used. As such an annular elastic member 24, for example, one in which a plurality of arc-shaped members are connected by a coil spring or the like can be used.

(6) In the above-described embodiment, an example in which the outer cylinder member has a cylindrical shape has been shown, but the present invention may be an outer cylinder member having a shape other than a cylindrical shape, such as a square columnar outer cylinder member. It is possible. For example, for a quadrangular prism-shaped outer cylinder member, the membrane module of the present invention can be configured by using an elastic member in which four L-shaped members are connected by a coil spring or the like.

(7) In the above-described embodiment, the example in which the elastic member 24 having a quadrangular cross-sectional shape is used has been described, but as shown in FIGS. 6A and 6B, the elastic member 24 having various cross-sectional shapes is used. Is also possible. For example, the elastic member 24 shown in FIG. 6(a) has an inclined surface 24a whose diameter increases from the center side of the outer tubular member toward the end portion thereof, and the inner fitting member is provided at the end portion of the outer tubular member. At the time of insertion, the end surface of the outer tubular member abuts the inclined surface 24a of the elastic member 24, so that the elastic member 24 can be contracted. At this time, the inclined surface 24a does not have to be a flat surface, and may be a curved surface as shown in FIG. 6(b).

Further, when the elastic member is expandable so as to substantially fit in the inner wall annular groove, as shown in FIG. 6C, the elastic member 24 extends from the end portion side of the outer tubular member toward the center side. It is preferable to have an inclined surface 24a that reduces in diameter.

(8) In the above-described embodiment, the example in which the inner wall annular groove 21a and the outer wall annular groove 22d have a rectangular cross-sectional shape is shown. However, in the present invention, at least the elastic member 24 is at the end of the inner wall annular groove 21a. The sectional shapes of the inner wall annular groove 21a and the outer wall annular groove 22d are not particularly limited as long as they can be engaged with the central side wall of the partial side wall and the outer wall annular groove 22d. However, in order to enhance the retaining effect by engagement, the end side wall of the inner wall annular groove 21a and the central side wall of the outer wall annular groove 22d are formed perpendicular to the inner wall of the outer tubular member or the outer wall of the inner fitting member. Preferably.

(9) In the above embodiment, an example of the membrane module in which the spiral membrane element including the flat membrane is housed in the container has been shown, but in the present invention, the hollow fiber membrane may be housed in the container. .. In that case, the fitting structure described above is applied as the fitting structure at the end of the conventional container.

1 Membrane Element 2 Separation Membrane 3 Permeation-side Channel Material 5 Central Tube 5a Opening 6 Supply-side Channel Material 7 Raw Liquid 8 Permeate 9 Concentrated Liquid 13 Exterior Material 20 Pressure Vessel (Container)
21 Cylindrical member (outer cylinder member)
21a Inner wall annular groove 22 First end member (inner fitting member)
22a undiluted solution supply part 22c sealing material 22d outer wall annular groove 23 second end member (internal fitting member)
23a Permeated Liquid Discharge Portion 23b Concentrated Liquid Discharge Portion 24 Elastic Member 24a Slope R R Winding Body

Claims (5)

In a membrane module comprising a separation membrane and a container that houses the separation membrane and has a fluid inlet and an outlet,
The container includes an outer tubular member, an inner fitting member that is internally fitted to at least one end of the outer tubular member, and a seal member and an elastic member that are interposed between the outer tubular member and the inner fitting member. Including,
The outer tubular member has an inner wall whose cross-sectional shape is substantially circular, and has an inner wall annular groove on the inner wall surface of the end portion,
The inner fitting member has an outer wall annular groove at a position facing the inner wall annular groove on the outer wall surface,
The elastic member engages said inner wall annular groove and the outer wall an annular groove, wherein Ri enlargement or reduction can der to substantially fit in the inner wall annular groove or the outer wall annular groove, the size of the inner wall periphery of the outer cylinder member Membrane module characterized by a C-ring that can be reduced below The membrane module according to claim 1 , wherein the elastic member is a C ring having an inclined surface whose diameter increases from the center side of the outer tubular member toward the end side. The membrane module according to claim 1 or 2 , wherein an edge surface of the inner wall surface of the outer tubular member has an inclined surface whose diameter increases from the center side toward the end side. The inner fitting member has a sealing annular groove closer to the center of the outer tubular member than the outer wall annular groove, and the sealing material is an O-ring held in the sealing annular groove . 3. The membrane module according to any one of 3 above. A perforated central tube, a wound member in which a membrane member including the separation membrane, a supply-side channel material and a permeate-side channel material is wound around the central tube, and the outer periphery of the wound body. The membrane module according to any one of claims 1 to 4 , wherein a membrane element including an exterior material is housed in the container.

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